Air cooled die-holder



June 7, 1938. h w, J. SCHUSTER 2,119,516

AIR cooLED DE HOLDER Filed Sept. l2, `1936 2 Sheets-Sheet 1 v June 7,1938. w. J. scHusTER AIR cooLED DIEHOLDER 2 Sheets-Sheet 2 Filed Sept.l2, 1936 Patented June 7, 1938 UNITED STATES PATENT OFFICE AIR COOLEDDIE-HOLDER Application September 12, 1936, Serial No. 100.530

8 Claims.

v This invention relates to die-holders and more particularly to aircooled die-holders.

When wire is drawn through a die, a great amount of friction results.'I'his friction is evidenced in the form of heat which must bedissipated in order to prevent damaging the die or the wire being drawn,or both. The problem of dissipating the heat generated in the wiredrawing operation is magnied by the desire to use the die for relativelylong periods and at high drawing speeds.

The present invention has for its object the provision of means fordissipating the heat in the die-holder with such effectiveness that thedie may be used for high speed continuous wire drawing Withoutoverheating.

The above and other objects will be apparent as the descrip-tionproceeds and by reference to the accompanying drawings, in which:

Figure 1 is a plan of a die-holder constructed in accordance with myinvention.

Figure 2 is a sectional elevation taken on line II-II of Figure 1.

Figure 3 is an elevation taken on line III- III of, Figure 2.

Figure 4 is an elevation of the quickly releas- Vable means mounting thedie-holder on the base.

Referring to the accompanying drawings, the letter H refers generally toa die-holding member which is an integral casting and which is mountedby any convenient means, for example, byV a base plate 4. To assist thebase plate 4 in properly supporting the member H, it is provided with acircular recess 6 in its upper surface and a circular boss I directlyunderneath the recess 6. The base plate 4 is usually mounted on a tablesupport 8 with the boss 'I extending into a hole in said support.Preferably, bolts I and I2 received in a hole I4 and slot I6,respectively in opposite ends of the base plate 4, are employed tosecure the base plate 4 to the support 8. By mounting the base plate 4in this manner, it can be moved through a small arc using the bolt I0 asa center to properly align the member H with Wire block (not shown) Anaperture I8 is provided in the base plate 4 at the bottom of the recess6, and is threaded at its lower end to receive a pipe 20. The pipe 20 isadapted to be connected with any suitable means for supplying it withcompressed air so that a stream of air can be forced into the apertureI8. Circular recesses I9 and 2l extend into the base plate 4 indiagonally opposite portions thereof.

The member H has flanges 24 and 25 terminating in arms 24a and 25a,respectively, and is provided with a boss 2Ia on its bottom surfacewhich snugly ts in the recess 6 on the base plate 4. The inner surfaceof tWo of the diametrically opposite arms 24a and 25a of the flanges 24and 25 are provided with semicircular recesses 26 and 2l which overleapertures 22 and 23 in the base plate 4, which apertures have shouldersintermediate their ends. The other pair of arms 24a and 25a are providedwith centering bolts 28 and 29 which t in the recesses I9 and 2l whenthe member H is positioned on the base plate 4. The centering bolts 28and 29 make the member H take and maintain exactly the same positioneach time it is secured to the base plate 4.

In order to firmly hold the member H to the base plate 4 by quicklyreleasable means so that other similar die-holders can rapidly besubstituted for the member H, bolts 38 are provided which extend throughthe apertures 22 and 23 of the base plate 4 and the recesses 26 and 21of the anges 24 and 25 when they overle the apertures 22 and 23. Thebolts 30 have flattened ends to which are pivotally secured levers 32having U-shaped heads and cammed bottom surfaces adapted to releasablybear upon the flanges 24 and 25. The bolts 30 are preferably retained intheir vertical positions, even though the flanges 24 and 25 are removedfrom underneath them by means of flanges 33, on the bolts 30, which bearupon the shoulders in the apertures 22 and 23.

When the levers 32 are in their vertical positions, enough clearance isprovided between them and the base plate 4 so that the flanges 24 and 25and the bolts 28 and 29 do not strike the base plate 4 or otherwiseinterfere in positioning the member H on the base plate 4. The clampingaction of the bolts 30 and the levers 32 can be adjusted by varying thepositions of the nuts on the ends of the bolts 38. As the bolt 30 andthereby the levers 32 are held up, it is quite easy to put the boss 2laof the member H in the recess of the base plate 4 so that by rotatingthe member H the recesses 26 and 21 engage the bolts 3|), and thecentering bolts 28 and 29 lit in the recesses I9 and 2l. Then the memberH is readily secured in place by moving the levers 32 down so that theircam surfaces bear upon the anges 24 and 25.

The member H has a rectangular body portion 36 which has the flanges 24and 25 on its longitudinal edges. The body portion 36 has the bossextends through the boss 21a. 55

and means for circulating air through said aperture and exhausting itacross both faces of said die.

5. An air cooled die-holder comprising means for bearing upon opposedfaces of a multiple-hole Y ing streams of air across both faces of saiddie so as to lower the temperature thereof.

6. A11 air cooled die-holder comprising meansV for bearing upon opposedfaces of a multiple-hole die, a die-holding member adapted to engagewith said means andrthereby positively position said die, means forcirculating air through said member and directing at least one stream ofair across both faces of said die so as to lower the temperaturethereof.

'7. An air cooled die-holder comprising a body portion having anaperture therein, spaced parallel arms integral with and extendingsubstantially normally from said body portion, clamping means carried bysaid arms and adapted to be moved substantially normally to the planesof said arms, said clamping means being constructed and arranged toengage with a multiple-hole die and positively position it between saidarms, and means for circulating air through said aperture and exhaustingstreams of air across the faces of the die.

8. An air cooled die-holder comprising a body portion, spaced parallelarms integral with said body portion, clamping means carried by saidarms, said clamping means being constructed and arranged to engage witha multiple-hole die and positively position it between said arms, andmeans for circulating air through said body portion and exhaustingstreams of air across the faces of "the die. A Y

WILLIAM J. SCHUSTER.

